/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.db.mpp.plan.execution.config.metadata;

import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.SettableFuture;
import org.apache.iotdb.confignode.rpc.thrift.TShowClusterResp;
import org.apache.iotdb.db.mpp.common.header.ColumnHeader;
import org.apache.iotdb.db.mpp.common.header.ColumnHeaderConstant;
import org.apache.iotdb.db.mpp.common.header.DatasetHeader;
import org.apache.iotdb.db.mpp.common.header.DatasetHeaderFactory;
import org.apache.iotdb.db.mpp.plan.execution.config.ConfigTaskResult;
import org.apache.iotdb.db.mpp.plan.execution.config.IConfigTask;
import org.apache.iotdb.db.mpp.plan.execution.config.executor.IConfigTaskExecutor;
import org.apache.iotdb.db.mpp.plan.statement.metadata.ShowClusterStatement;
import org.apache.iotdb.rpc.TSStatusCode;
import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType;
import org.apache.iotdb.tsfile.read.common.block.TsBlockBuilder;
import org.apache.iotdb.tsfile.utils.Binary;

import java.util.List;
import java.util.stream.Collectors;

import static org.apache.iotdb.commons.conf.IoTDBConstant.NODE_TYPE_CONFIG_NODE;
import static org.apache.iotdb.commons.conf.IoTDBConstant.NODE_TYPE_DATA_NODE;

public class ShowClusterTask implements IConfigTask {

    private final ShowClusterStatement showClusterStatement;

    public ShowClusterTask(ShowClusterStatement showClusterStatement) {
        this.showClusterStatement = showClusterStatement;
    }

    @Override
    public ListenableFuture<ConfigTaskResult> execute(IConfigTaskExecutor configTaskExecutor)
            throws InterruptedException {
        return configTaskExecutor.showCluster(showClusterStatement);
    }

    private static void buildTsBlock(
            TsBlockBuilder builder,
            int nodeId,
            String nodeType,
            String nodeStatus,
            String hostAddress,
            int port) {
        builder.getTimeColumnBuilder().writeLong(0L);
        builder.getColumnBuilder(0).writeInt(nodeId);
        builder.getColumnBuilder(1).writeBinary(new Binary(nodeType));
        builder.getColumnBuilder(2).writeBinary(new Binary(nodeStatus));
        builder.getColumnBuilder(3).writeBinary(new Binary(hostAddress));
        builder.getColumnBuilder(4).writeInt(port);
        builder.declarePosition();
    }

    public static void buildTSBlock(
            TShowClusterResp clusterNodeInfos, SettableFuture<ConfigTaskResult> future) {
        List<TSDataType> outputDataTypes =
                ColumnHeaderConstant.showClusterColumnHeaders.stream()
                        .map(ColumnHeader::getColumnType)
                        .collect(Collectors.toList());
        TsBlockBuilder builder = new TsBlockBuilder(outputDataTypes);

        clusterNodeInfos
                .getConfigNodeList()
                .forEach(
                        e ->
                                buildTsBlock(
                                        builder,
                                        e.getConfigNodeId(),
                                        NODE_TYPE_CONFIG_NODE,
                                        clusterNodeInfos.getNodeStatus().get(e.getConfigNodeId()),
                                        e.getInternalEndPoint().getIp(),
                                        e.getInternalEndPoint().getPort()));

        clusterNodeInfos
                .getDataNodeList()
                .forEach(
                        e ->
                                buildTsBlock(
                                        builder,
                                        e.getDataNodeId(),
                                        NODE_TYPE_DATA_NODE,
                                        clusterNodeInfos.getNodeStatus().get(e.getDataNodeId()),
                                        e.getInternalEndPoint().getIp(),
                                        e.getInternalEndPoint().getPort()));

        DatasetHeader datasetHeader = DatasetHeaderFactory.getShowClusterHeader();
        future.set(new ConfigTaskResult(TSStatusCode.SUCCESS_STATUS, builder.build(), datasetHeader));
    }
}
